Apparatus for the grooving of cardboard



Oct 16, 1928.

E. MOGEL APPARATUS FOR THE GROOVING 0F CARDBOARD "2 Sheets-Sheet 1 Filed Nov. 2, 1927 Patented Oct. 16, 1928.

UNITED STATES PATENT OFFICE.

ERNST MISGEL, F MEISSEN-ON-THE-ELBE, GERMANY, ASSIGNOiB. TO THE FIRM AK- TIEI Q'GESELLSCHAFT FUR. OARTONNAGENINDUSTRIE, 0F DRESDEN, GERMANY.

APPARATUS FOR THE GROOVING OF CARDBOARD.

Application filed November 2, 1927, Serial No. 230,611, and in Germany November 4, 1926.

This invention relates to novel apparatus for the grooving of cardboard, including corrugated cardboard, and'is characterized by the feature that the groove (compare Fig.

I 1) is produced by drawing the sheet of cardboard through an implement formed by three blades. Inasmuch as the blades form a passage of definite profile, through which the cardboard is drawn, it may be compared with a draw plate for the drawing of profiled wires, except for the fact that in the case of the present invention the blades form a gradually narrowing passage. It is just in this gradual narrowing of the passage,

however, that the advantage of the new apparatus consists, as compared with the grooving appliances with rollers that are otherwise customary. Inthese known appliances, on account of the curvature of the cooperating rollers, the cross-sectional area of passage tapers so rapidly thatjthe cardboard is constrained to acquire the channel-shaped profile too quickly, or in other words on too short a path, which involves heavy stressing of the cardboard and very-great resistance to the work. In the new apparatus the tapering or narrowing of the profile formed by the blades can be distributed over as long a tract as may be desired, with formation of the groove, which in t e case of a roller groover, would only be possible with rollers of excessively large diameter, which in practice would be inadmissible on account of the space occupied. The apparatus according to the invention may be constructed in various forms. For the treatment of ca-rdboards which are always of the same thickness the three blades may be undisplaceable in relation to one another, and two of them, which will hereinafter be referred to as the upper blades, may be united to form a single body. In most 1 cases, however, the blades will be made relatively adjustable, so as to enable cards of different thicknesses to be treated and to enable the groove to be more or less sharply impressed as desired. The third blade, hereinafter briefly referred to as the lower blade, may if desired be formed by a chain running over chain wheels and supported between the chain wheels by a sliding surface, this chain moving with the cardboard, and having radual \tivelyto the end parts of the bolt located in longitudinal ribs on the back of the links, which collectively form the lower blade.

In the accompan ing drawing,

Figure 1 shows t e piece of cardboard P, with a groove p being produced by the apparatus according to the invention,

Figure 2 is a side elevation, and

Figure 3 is a front elevation of one con- 00 structional form, while Figure 4 is a side elevation, and

Figure-5 is a front elevation of a further constructional form.

In most cases it is a question of producing 05 a number of parallel grooves simultaneously in the sheet of cardboard. There will therefore usually be a plurality of the devices hereinafter described 011 one machine, and these will be arranged in such away that the individual devices are adjustable as regards their distances from one another. In the drawings only a single device is illustrated.

Extending transversely across the machine there are two shafts land 2 of large diameter, which are driven in the directionof the arrow at the same velocity, and which carry, for each individual device, a roller or disc, 3 and 4 respectively. The rollers 3 and 4 co-operate with rollers 5 and 6, which are journalled in forked holders 7 and 8. These holders are vertically and transversely adjustable in transverse frame beams 9 and 10.

They are adjustable in height for the purpose of enabling them to be adjusted according to the thickness of the cards to be treated; and they are transversely displaceable, as are also the rollers 3 and 4:, for the purpose of enabling them to be adjusted to the appropriate distance from the adjacent devices. For the roller 5 an additional special adjusting means is provided for the accurate settlement of its'height in relation to the upper blades. The centre part of a bolt 11, upon which the roller 5 rotates, is eccentrically ofi'set relathe fork 7 so that by rotating the bolt the height of the roller axis is altered. For the purpose of the adjusting, the bolt head 12 is formed as-a worm wheel, with which there engages a worm 13, rotated by a handle 14.

The two pairs of rollers, the upper members of which are driven by friction against the cardboard P, serve in the first place for concardboard at the position where the groove is to be produced, by laterally crowding together the material, which then assumes the arched form shown at p in Fig. 3. By virwe of this pressing, even corrugated cardboard can be grooved, because the corrugations are pressed down in the nei hbourhood of the grooves to be .produced. The roller 4 is provided with an encirclsng rib 4', which, in co-operation with the roller 6, which is .pro-. vided with a corresponding groove ,6, comapparatus according to the invention may, however, be constructed in combination with ordinary rollers, that is, merely conveying rollers. v

The actual implements for the grooving of the cardboard consist of two upper blades 15and 16, and a lower blade 17. The two upper blades are inclined towards the right in Fig. 2. and overlap the lower blade 17, which in plan lies between them, so that the cardboard, upon passing between the three blades, is depressed on both sides of the lower blade and is pressed against the sides of the lower blade, whereby it gradually assumes a profile of the shape shown in' Fig. 1. It will be understood that the lower blade has the form of a rib similar to the rib 4' on the roller 4, While the upper blades are in the form of ledges or strips, as shown in Fig.3. In order to enable the two upper blades to be adjusted relatively to one another the strips 18 and 19 are constructed towards the top as levers, which are rockable about bolts 20 and 21 in the holder 7. The upper ends of the lovers are formed as segments of worm wheels 22 and 23, in which there engage worms 24 and 25, the threads of which run in opposite directions, upon a transverse shaft 26. 'By means of a worm wheel 27 on this shaft and a worm wheel 28 on a shaft 29, with a handle 30, the shaft26, with the two worms, can be. rotated, in which case the upper blades 15 and 16 are rocked either towards the lower blade 17 or away from the latter, according to the direction of rotation.

In the second constructional trated in Figs. 4 and 5, instead of the stationary lower blade 17 there is a chain consisting of links 17 having ribs 17 of the same form of profile as the fixed blade 17. The chain runs over chain wheels 31 and 32 and is supported between the two chain wheels, by a stationary gliding surface 33. 34- is a guiding and tensioning roller for the chain. The chainwheels are mounted between the halves of two-part rollers 3 and 4 The roller 5 has a recess 5' turned in it, as

board,

form, 'illus shown in Fig. 5, and the roller 6*, with a groove 6", corresponds to the roller 6' of the firstconstructional example. The arch p of the cardboard P may be produced by a special pair of rollers, not shown, or the card- I blades bear against it on one side and the pletes the formation of the groove 1n the" manner of an ordinary roller groover. The

other. on the other side, at a position between the first two blades.

2. Apparatus for the grooving of cardincluding corrugated cardboard, comprising three blades so placed as to form a gradually tapering channel-shaped passage, rollers forcdrawing the cardboard through said passage so that ,two of the blades bea'fwgainst it on one side and the other on the other side, at a position between the first two blades, and means for varying the distance apart of the two blades that act on the same side of the cardboard.

3. Apparatus for the grooving of cardboard, includin corrugated cardboard, comprising three blades so placed as to form a gradually tapering channel-shaped passage, rollers for drawing the cardboard through said passage so that two of the blades bear against it on one sideand the other on the other side, at a position between.

the first two blades, and means forvarying the distance of the two blades that act on the same side of the cardboard from the other blade.

4:. Apparatus for the grooving of cardboard, including corrugated cardboard, comprising three blades so placed as to form a gradually tapering channel-shaped passage, rollers for drawing the cardboard through said passage so that two of the blades bear against it on one side and the other .on the other side, at a position between the first two blades, means for varying the distance apart of the two blades that act onthe same side of the cardboard, and

means for varying the distance of the two of said blades being substantially parallel to one another, a third blade arranged between said parallel blades and adapted to bear against the other side of the cardboard,

the plane containingthe edges of the parallel blades being clear of the third blade at one end but intersecting it at a small angle at an intermediate point, and rollers for drawing the cardboard between said blades.

6. Apparatus for the groovingof cardboard, including corrugated cardboard, comprising a carrier, means for adjusting the height of said carrier, two blades pivotally mounted on said carrier and adapted to bear against one side of the cardboard, the acting edges of said blades being substantially parallel to one another, means for rocking said blades transversely about their pivots in opposite directions to vary the distance between their acting edges, a third blade arranged between said parallel blade and adapted to bear against the other side of the cardboard, the plane containing the edges of the parallel blades being clear of the third blade at one end but intersecting it at a small angle at an intermediate point, and rollers for drawing the cardboard between said blades.

7. Apparatus for the grooving of cardboard, including corrugated cardboard, comprising a carrier, means for adjusting the height of said carrier, two blades pivotally mounted on said carrier and adapted to bear against one side of the cardboard, the acting edges of said blades being substantially parallel to one .another, means for rocking said blades transversely about their pivots in opposite directions to vary the distance between their acting edges, said means comprising worm wheel sectors formed on said blades, a transverse shaft, and two oppositely threaded worms secured to said shaft, and meshing with said worm wheel sectors, and a third blade arran ed between said parallel blades and adapte to bear against the other side ofthe cardboard, the plane containing the edges of the parallel blades being clear of the third blade at one end but intersecting it at a small angle at an intermediate point, and rollers for drawing the cardboard between said blades.

8. Apparatus for the grooving of cardboard, including corrugated cardboard, comprising a carrier, two blades fitted to said carrier and adapted to bear against one side of the cardboard, the acting edges of said blades being substantially parallel to.

one another, a pair of chain wheels, a chain passing round said chain wheels, a longitudinal ribon each link of said chain, said ribs combining to form a third blade arranged between said parallel blades and adapted to'bear againstthe other side of the cardboard, a stationary supporting surface over which the chain glides and whichfis adapted to hold said chain in such a position that the plane containing the ed es of the parallel blades is clear of the third blade at one end but intersects it at a small angle at the edges of the parallel blades being clearof the third blade at one end but intersecting it at a small angle at an intermediate point, and rollers for d-rawing the cardboard between said blades.

10. Apparatus for the grooving of cardboard, including corrugated cardboard, comprising a carrier, two blades fitted to said carrier and adapted to bear against one side of the cardboard, the acting edges of said blades being substantially parallel to one another, a third blade arranged between said parallel blades and. adapted to bear against the other side of the cardboard, the plane containing the edges of the parallel blades being clear of the third blade at one end but intersecting it at a small angle at an intermediate point, rollers for drawing the cardboard between said blades,

and rollers for feeding the cardboard to-' wards said blades, one of said feeding rollers having a convex nm and the other a concave rim, so as to arch the cardboard before it reaches the grooving blades.

11. Apparatus for the grooving of cardboard, including corrugated cardboard, comprising a carrier, two blades fitted to said carrier and adapted to bear against one side of the cardboard, the acting edges of said blades being substantially parallel 'to one another, a third blade arranged between said parallel blades and adapted to bear against the other side of the cardboard, the plane containing the edges of the parallel blades being clear of the third blade at one end but intersectin it at a small angle at an intermediate polnt, rollers for drawing the cardboard between said blades, a circumferential rib on one of said rollers, and a corresponding circumferential groove on the other, said rib and oove being adapted to complete the grooving of the cardboard.

12. Apparatus for the grooving of cardboard, including corrugated cardboard, comprising a carrier, two blades fitted to said carrier and adapted to bear against one side of the cardboard, the acting edges of said blades being substantiall parallel to one another, a pair of chain w eels, a chain passin round said chain wheels, a longitudina rib on each link of said chain,said ribs combining to form a third blade arranged between said parallel blades and a circumferential groove on the drawing adapted to bear against the other side of the roller which is on the same side of the cardeardboard, a stationary supporting surface board as the two grooving blades, said over which the chain glides and which is groove being adapted to co-operate with 5 adapted to hold said chain in such a position the ribs on the chain links to complete the 15 that the plane containing; the edges of the grooving ofthe cardboard. parallel blades is clear of the third blade In testimony whereof I have signed my at one end but intersects it at a small angle name to this specification. at an intermediate point, rollers for drawing the cardboard between said blades, and ERNST MOGEL. 

